diff --git a/legacy/eina/src/include/eina_stringshare.h b/legacy/eina/src/include/eina_stringshare.h
index e24cb8bb14..6c8193eb76 100644
--- a/legacy/eina/src/include/eina_stringshare.h
+++ b/legacy/eina/src/include/eina_stringshare.h
@@ -51,6 +51,8 @@
 #ifndef EINA_STRINGSHARE_H_
 #define EINA_STRINGSHARE_H_
 
+#include <stdarg.h>
+
 #include "eina_types.h"
 
 /**